Door-handling mechanism



J. S. NEFCZESAUSKAS DOOR HANDLING MECHANISM July 31, 1928. 1,679,227

Filed Jan. 25. 1922 3' Sheets-Sheet 1 V I Inventor Wfi Q5 SheetQ-Sheet 3 Jul 31. 1928.

J'.'S. NEFCZESAUSKAS boon HANDLING MECHANISI Filed Jan. 25. 1 2

v m F, A 1 a 1. 2/ 1 7 a l v wi /226E 3 Patented July 31, 1928.

UNITED STATES rmazzr JOSEPH S, NEFCZESAUSKAS, OF CLEVELAND, OHIQ.

DOOR-HANDLING MEGHANISM'.

Application filed January 25, 1922,. Serial No. 5 31.,75 6.

This invention relates to improvements in door handling mechanisimfor use especially in opening and closing the heavy door of garages, shops and the like. 1

The objects of this invention are to providemotor operated means for moving the doors, with, means for automatically stopping the motor when the doors reach either .open. or closed position; to provide motor means which can be operated in the same direction for both opening and closing the doors, thereby avoiding the necessity of a re versible motor; to provide'improved operative connections, which are highly efficient and yet comparatively simple in structure and operation.

Further objects of the invention will be apparent from the following description and claim when considered together with the drawings.

Fig. 1 shows my device in side elevation; Fig. 2 shows the electric control system; Fig. 3 is an inverted plan View taken on line 3-3, Fig. 5; F ig, 4 is a view taken on line 4-4, Fig. 1, showing the electric switch in elevation; Fig. 5 is a view taken on line 5-5, Fig. 1; Fig. 6 is an end view of the electric switch; and Fig. 7 is a view of the same switch taken from the side opposite that shown in Fig. 4.

The doors 1 and 2 are hinged as at 3 to the door jambs 4 and above the doors there is suitably supported the shelf or support 5 by means of the brackets 6. Upon this shelf there is supported th motor 7 which has drive connection through the belt 8 with the pulley 9. The pulley 9 is suitably supported upon the bracket 6 and carries a worm 11 which has meshing engagement with the worm gear 12 which is also suitably supported in the bracket 6. The hub 13 on the worm gear 12 has fixed thereto the crank arm 14, the free end of which has pivotal connection as at 15 with the link 16. The link 16 is pivotally connected as at 17 to the crank arm 18 carried upon the shaft 19 suitably supported in the brackets 6 for rotation therein. The shaft 19 carries the bevel gears 20 and 21 which mesh with the bevel gears 22 and 23 which are also mounted in the shelf 5. The hubs of the bevel gears 22 and 23 extend through the shelf 5 and carry at their lower ends the crank arms 26 and 27 the free ends of which have pivotal'connection as at 28and 29 with th links 30 and 31, which in turn have pivotal connection at32. and 33 With. the cars 34 and 35 attached to the doors. Vith the above described mechanism it will, be seen that upon operation of the motor in the,

same directionothe shaft 19 Will, be rocked back and forth, and the gears 22 and23 will be rotated alternately in opposite directions. 1

arm 36 fixed upon the shaft 19 for rocking movement therewith, and to the free endof the crank arm 36 I have pivotally connected;

as at 37 the arm 38 which has pin and slot connection as indicated at 39 and 40 with the upper end of the switch arm 41. Y The switch arm 41 is pivotally mounted as at 42 on the support 43 which in turn is secured upon the shelf 5. The contact blades 44 and 45 are also carried by the support 43 and are spaced at their adjacent ends, as indicated at 46. Binding posts 47 and 48 are provided for the contact blades and binding post 49 is provided for the switch arm 41, the electric connections of which will be clearly understood from the diagram in Fig. 2. The coil spring 50 is attached at one end to the support of the switch mechanism at a point directly beneath the pivot point 42 of the switch arm 41, and at its other end, as at 51, to the upper end of the switch arm 41; so that when the switch arm 41 has been moved slightly past vertical position, the tension of the spring 50 will cause the switch arm to be snapped past such dead point so as to be brought into electric contact with the other of the contact blades. It is to be understood that the momentum of the motor is sufiicient to carry the switch arm 41 slightly past the vertical position even after the motor has been cut out of the circuit. This will be more readily understood by referring to the diagram in Fig. 2. 7

According to the diagram in doors can be opened or closed by operation of a switch 53. Upon turning the switch 53 so as to contact with the button 54, the circuit through the motor will pass through the wire 55, contacts 53 and 54, wire 56, contacts 45, which is engaged by the switch arm 41, it being understood that the contact 54 corresponds to the contact 45. Operation of Fig. 2, the

the motor will cause the switch arm 41 to leave the contact blade 45 and to pass into the gap 46. The momentum of the motor after being cut out is suflicient, however, to cause the switch arm 41 to pass beyond vertical position, whereupon the force of the spring 50 will cause the switch arm 41 to snap into contact with the blade 4* so as to establish contact at this point. The doors now stand in closed position, the motor having been cut out. The circuit through the switch arm 41 and the blade 44 is completed upon operation of the switch 53 so as to close the circuit at the point 58, as will be done whenever it is desired to open the doors. The lever connections between the motor and the doors are so co-related with respect to the switch mechanism that the doors will have been either fully opened or closed when the motor stops. Thus the movement of the doors will be automatically stopped as soon as they are either fully opened or closed. It will also be seen that upon the motor being automatically stopped in the manner just now described the circuit is set for the next operation so that the doors can be moved in the opposite direction as soon as the operator changes the position of the switch 53.

What I claim is:

Door opening and closing mechanism, comprising bracket means arranged in close proximity to the door opening and extending across the top and along the sides of the same, an operating motor mounted on the top portion of said bracket means, crank arms extending along and mounted in one side portion of said bracket means, operative connections between said motor and crank arms, a shaft mounted in the side portions of said bracket means and extending across the top portion thereof, and crank arms for the door having operative connections through the top portion of said bracket means with said operating shaft, said parts being so constructed and arranged as to effect opening and closing of the door by operation of the motor in the same direction,

In testimony whereof I hereby afiix my signature.

JOSEPH S. NEFCZESAUSKAS. 

